Contact   Imprint   Advertising   Guidelines

What pressure do I need?

Here you can exchange your experience and datas about your home build boards
andrewjohn
Medium Poster
Posts: 105
Joined: Fri Dec 01, 2006 3:16 pm
Has thanked: 0
Been thanked: 1 time

What pressure do I need?

Postby andrewjohn » Sat Oct 27, 2012 2:34 pm

I've been thinking about making a board or two for a while now, and have just got round to getting some stuff together.
I managed to get hold of a 24 litre expansion vessel, and today set about a simple test.
So stuck a vac gauge on top and sucked the air out using my kite pump.
I managed to suck out -15 hg or .5 bar.
Is this sufficient for vac bagging purposes? I'd rather not buy a proper vac pump just yet, and the only fridge compressors I've been able to get hold of couldn't pull the skin off a rice pudding, let alone a decent vacuum.
First project will be a landboard, which would be able to take more pressure than a kiteboard with a foam core.

Johnny Rotten
Very Frequent Poster
Posts: 501
Joined: Thu Dec 04, 2008 1:50 am
Style: Surf and wake
Gear: Vegas
Torch
Neo's
Hand made boards of pure excellence
Brand Affiliation: None
Location: No fixed address
Has thanked: 10 times
Been thanked: 29 times

Re: What pressure do I need?

Postby Johnny Rotten » Sat Oct 27, 2012 2:46 pm

15 in HG COULD be fine, you don't need to push the bag down to make the glass fit tight corners or fine details on boards so you'll be good. for reference if you are using a structural foam (D-cell or corecell) you can suck it to 30 in hg no problem.

IF your pump is really low flow you may have to be thorough ensuring your bag is well sealed to get pressure

You also MIGHT run into issues trying to get the rocker to curve to the rocker table if you are using a stiff core material. As long as it sucks your board to the rocker table you're good to go,

If not using a rocker table but a preshaped core, no concern.


Return to “Gear Builders”

Who is online

Users browsing this forum: No registered users and 126 guests